The number of molecules that are needed in a 23.45 g sample of copper (ii) hydroxide, are 1.45 x 10²³.
Avogadro's number is the measurement of the one mole of any substance that is equal to the Avogadro's number.
Avogadro's number is 6.022 × 10²³.
To calculate the moles
Moles = mass / molar mass
Mass is 23.45 g
Molar mass is 97.562
Putting the value in equation
Moles = 23.45 g/ 97.562 = 0.24 mol.
The moles of copper (II) hydroxide has been 0.24 mol.
The number of molecules in 0.24 mol sample has been driven by:
1 mol = 6.022 × 10²³.
0.24 mol = 0.24 x 10²³.
0.24 mol = 1.45 x 10²³.
Thus, the number of molecules that are needed in a 23.45 g sample of copper (ii) hydroxide, are 1.45 x 10²³.
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